package com.dsj.common.utils;


import com.dsj.common.config.Constant;
import com.dsj.common.domain.ColumnDO;
import com.dsj.common.domain.TableDO;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.WordUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 代码生成器   工具类
 */
public class GenUtils {


  public static List<String> getTemplates() {
    List<String> templates = new ArrayList<String>();
    templates.add("templates/common/generator/domain.java.vm");
    templates.add("templates/common/generator/Dao.java.vm");
    //templates.add("templates/common/generator/Mapper.java.vm");
    templates.add("templates/common/generator/Mapper.xml.vm");
    templates.add("templates/common/generator/Service.java.vm");
    templates.add("templates/common/generator/ServiceImpl.java.vm");
    templates.add("templates/common/generator/Controller.java.vm");
    templates.add("templates/common/generator/list.html.vm");
    templates.add("templates/common/generator/add.html.vm");
    templates.add("templates/common/generator/edit.html.vm");
    templates.add("templates/common/generator/list.js.vm");
    templates.add("templates/common/generator/add.js.vm");
    templates.add("templates/common/generator/edit.js.vm");
    //templates.add("templates/common/generator/menu.sql.vm");
    return templates;
  }

  /**
   * 生成代码
   */


  public static void generatorCode(Map<String, String> table,
                                   List<Map<String, String>> columns, ZipOutputStream zip) {
    //配置信息
    Configuration config = getConfig();
    //表信息
    TableDO tableDO = new TableDO();
    tableDO.setTableName(table.get("tableName"));
    tableDO.setComments(table.get("tableComment"));
    //表名转换成Java类名
    String className = tableToJava(tableDO.getTableName(), config.getString("tablePrefix"), config.getString("autoRemovePre"));
    tableDO.setClassName(className);
    tableDO.setClassname(StringUtils.uncapitalize(className));

    //列信息
    List<ColumnDO> columsList = new ArrayList<>();
    for (Map<String, String> column : columns) {
      ColumnDO columnDO = new ColumnDO();
      columnDO.setColumnName(column.get("columnName"));
      columnDO.setDataType(column.get("dataType"));
      columnDO.setComments(column.get("columnComment"));
      columnDO.setExtra(column.get("extra"));

      //列名转换成Java属性名
      String attrName = columnToJava(columnDO.getColumnName());
      columnDO.setAttrName(attrName);
      columnDO.setAttrname(StringUtils.uncapitalize(attrName));

      //列的数据类型，转换成Java类型
      String attrType = config.getString(columnDO.getDataType(), "unknowType");
      columnDO.setAttrType(attrType);

      //是否主键
      if ("PRI".equalsIgnoreCase(column.get("columnKey")) && tableDO.getPk() == null) {
        tableDO.setPk(columnDO);
      }

      columsList.add(columnDO);
    }
    tableDO.setColumns(columsList);

    //没主键，则第一个字段为主键
    if (tableDO.getPk() == null) {
      tableDO.setPk(tableDO.getColumns().get(0));
    }

    //设置velocity资源加载器
    Properties prop = new Properties();
    prop.put("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    Velocity.init(prop);

    //封装模板数据
    Map<String, Object> map = new HashMap<>(16);
    map.put("tableName", tableDO.getTableName());
    map.put("comments", tableDO.getComments());
    map.put("pk", tableDO.getPk());
    map.put("className", tableDO.getClassName());
    map.put("classname", tableDO.getClassname());
    map.put("pathName", config.getString("package").substring(config.getString("package").lastIndexOf(".") + 1));
    map.put("columns", tableDO.getColumns());
    map.put("package", config.getString("package"));
    map.put("author", config.getString("author"));
    map.put("email", config.getString("email"));
    map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
    VelocityContext context = new VelocityContext(map);

    //获取模板列表
    List<String> templates = getTemplates();
    for (String template : templates) {
      //渲染模板
      StringWriter sw = new StringWriter();
      Template tpl = Velocity.getTemplate(template, "UTF-8");
      tpl.merge(context, sw);

      try {
        //添加到zip
        zip.putNextEntry(new ZipEntry(getFileName(template, tableDO.getClassname(), tableDO.getClassName(), config.getString("package").substring(config.getString("package").lastIndexOf(".") + 1))));
        IOUtils.write(sw.toString(), zip, "UTF-8");
        IOUtils.closeQuietly(sw);
        zip.closeEntry();
      } catch (IOException e) {
        throw new BDException("渲染模板失败，表名：" + tableDO.getTableName(), e);
      }
    }
  }


  /**
   * 列名转换成Java属性名
   */
  public static String columnToJava(String columnName) {
    return WordUtils.capitalizeFully(columnName, new char[]{'_'}).replace("_", "");
  }

  /**
   * 表名转换成Java类名
   */
  public static String tableToJava(String tableName, String tablePrefix, String autoRemovePre) {
    if (Constant.AUTO_REOMVE_PRE.equals(autoRemovePre)) {
      tableName = tableName.substring(tableName.indexOf("_") + 1);
    }
    if (StringUtils.isNotBlank(tablePrefix)) {
      tableName = tableName.replace(tablePrefix, "");
    }

    return columnToJava(tableName);
  }

  /**
   * 获取配置信息
   */
  public static Configuration getConfig() {
    try {
      return new PropertiesConfiguration("generator.properties");
    } catch (ConfigurationException e) {
      throw new BDException("获取配置文件失败，", e);
    }
  }

  /**
   * 获取文件名
   */
  public static String getFileName(String template, String classname, String className, String packageName) {
    String packagePath = "main" + File.separator + "java" + File.separator;
    //String modulesname=config.getString("packageName");
    if (StringUtils.isNotBlank(packageName)) {
      packagePath += packageName.replace(".", File.separator) + File.separator;
    }

    if (template.contains("domain.java.vm")) {
      return packagePath + "domain" + File.separator + className + "DO.java";
    }

    if (template.contains("Dao.java.vm")) {
      return packagePath + "repo" + File.separator + className + "Dao.java";
    }

    //		if(template.contains("Mapper.java.vm")){
    //			return packagePath + "repo" + File.separator + className + "Mapper.java";
    //		}

    if (template.contains("Service.java.vm")) {
      return packagePath + "service" + File.separator + className + "Service.java";
    }

    if (template.contains("ServiceImpl.java.vm")) {
      return packagePath + "service" + File.separator + "impl" + File.separator + className + "ServiceImpl.java";
    }

    if (template.contains("Controller.java.vm")) {
      return packagePath + "controller" + File.separator + className + "Controller.java";
    }

    if (template.contains("Mapper.xml.vm")) {
      return "main" + File.separator + "resources" + File.separator + "mapper" + File.separator + packageName + File.separator + className + "Mapper.xml";
    }

    if (template.contains("list.html.vm")) {
      return "main" + File.separator + "resources" + File.separator + "templates" + File.separator
              + packageName + File.separator + classname + File.separator + classname + ".html";
      //				+ "modules" + File.separator + "generator" + File.separator + className.toLowerCase() + ".html";
    }
    if (template.contains("add.html.vm")) {
      return "main" + File.separator + "resources" + File.separator + "templates" + File.separator
              + packageName + File.separator + classname + File.separator + "add.html";
    }
    if (template.contains("edit.html.vm")) {
      return "main" + File.separator + "resources" + File.separator + "templates" + File.separator
              + packageName + File.separator + classname + File.separator + "edit.html";
    }

    if (template.contains("list.js.vm")) {
      return "main" + File.separator + "resources" + File.separator + "static" + File.separator + "js" + File.separator
              + "appjs" + File.separator + packageName + File.separator + classname + File.separator + classname + ".js";
      //		+ "modules" + File.separator + "generator" + File.separator + className.toLowerCase() + ".js";
    }
    if (template.contains("add.js.vm")) {
      return "main" + File.separator + "resources" + File.separator + "static" + File.separator + "js" + File.separator
              + "appjs" + File.separator + packageName + File.separator + classname + File.separator + "add.js";
    }
    if (template.contains("edit.js.vm")) {
      return "main" + File.separator + "resources" + File.separator + "static" + File.separator + "js" + File.separator
              + "appjs" + File.separator + packageName + File.separator + classname + File.separator + "edit.js";
    }

    //		if(template.contains("menu.sql.vm")){
    //			return className.toLowerCase() + "_menu.sql";
    //		}

    return null;
  }
}
